Neil Clark Posted January 30, 2022 Report Share Posted January 30, 2022 One or two of the threaded 5/16UNF threaded holes in the chassis for attaching the body is just out of position in the refurbished chassis that I received. Hopefully I can widen the hole in the floor panels enough to fit but if I have to drill out the threads does anyone know a good source of strong steel UNF rivnuts these days? Link to comment Share on other sites More sharing options...
mark powell Posted January 30, 2022 Report Share Posted January 30, 2022 May be worth a look. https://memfast.co.uk/shop/Vprod2.asp?cat=6138003713 Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 30, 2022 Report Share Posted January 30, 2022 this type wont rotate as you force the hex in the hole to lock any rotation can take a good load to swage the thing in place 1 Link to comment Share on other sites More sharing options...
Neil Clark Posted January 30, 2022 Author Report Share Posted January 30, 2022 Thanks - do you know the supplier of the hex ones Pete? Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 30, 2022 Report Share Posted January 30, 2022 no just a google search , ive happen to have got some 8 and 10mm metrics we used in truck chassis mods but you need a hydraulic press to collapsed them keep them as a may be useful one day Pete Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 30, 2022 Report Share Posted January 30, 2022 there also ones like a expanding rawl plug idea can be useful if you cant get in to collapse the rivet swage and providing they dont try to rotate you can collapse rivenuts with a bolt washer and a nut to pull them up tight without any special pullers /pliers worth a look at Jack nuts as opposed to rive nuts have a browse at eg https://www.rivetwise.co.uk/rivets/rivet-nuts.asp Pete Link to comment Share on other sites More sharing options...
Neil Clark Posted January 30, 2022 Author Report Share Posted January 30, 2022 Thanks Pete Link to comment Share on other sites More sharing options...
Neil Clark Posted January 31, 2022 Author Report Share Posted January 31, 2022 In the end it all fitted without drilling! Link to comment Share on other sites More sharing options...
JohnD Posted January 31, 2022 Report Share Posted January 31, 2022 A Q. about Rivnuts. I have a set with an insertion tool, that looks very like a blind rivet tool. With the latter, I'm used to the give as the rivet is dilated, followed by it coming away from the work as the mandrel yields and breaks. This occurs with the strength of one hand - with rivets that are 5mm or less in diameter. I don't expect the last with a Rivnut! The tool uses a threaded mandrel, that must the unscrewed to leave the nut in place. But with as much strength as I can exert with two hands, I can feel no give at all, as the nut is dilated behind the panel. I find it very difficult to judge when the Rivnut is 'set'. Consequently I squeeze as hard as I possibly can, and I have torn the threads out of small nuts, and damaged the tool! Advice, please. How hard to squeeze and how to tell when the nut is 'set'? John Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 31, 2022 Report Share Posted January 31, 2022 i have always used a bolt with a nut and washer so you hold the bolt but can screw the nut to clamp the rivnut agree two gorilla's are needed to squeeze the nut Pete Link to comment Share on other sites More sharing options...
RogerH Posted January 31, 2022 Report Share Posted January 31, 2022 Hi John, on the smaller rivnuts M3 & M4 Ali pull them up until you feel it go tight. Then waggle the pliers. If it is in tight there will be no movement. If you feel any slack then keep squeezing. Steel and Stainless steel should not pull through. The biggest problem is trying to pull down M6 stainless. Power pliers are required. Roger Link to comment Share on other sites More sharing options...
Peter Truman Posted January 31, 2022 Report Share Posted January 31, 2022 another thing to watch with Rivnuts is the thickness of the steel your anchoring into too thick or an extra washer will result in the rivnut not compressing adequately behind, never tried to see if you can get longer rivnuts, . Link to comment Share on other sites More sharing options...
mark powell Posted February 1, 2022 Report Share Posted February 1, 2022 I've got one of these. Works a treat. Metric only though. https://www.sealey.co.uk/product/5637722451/drill-powered-rivet-nut-adaptor Link to comment Share on other sites More sharing options...
JohnD Posted February 1, 2022 Report Share Posted February 1, 2022 Does that matter, Mark? Thanks to all for the advice! Certainly, when I've used larger rivnuts I've resorted to a bolt and socket driver, as Pete suggests. Any idea how much torque required? Just until it doesn't wiggle, Roger? Not very scientific, but most practical. Link to comment Share on other sites More sharing options...
mark powell Posted February 1, 2022 Report Share Posted February 1, 2022 can't set UNF or UNC rivnuts without the right mandrels. Not a problem for me..... Yet. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 1, 2022 Report Share Posted February 1, 2022 You can buy both UNF and UNC mandrels but yikes they're expensive! Link to comment Share on other sites More sharing options...
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